<script setup>
import { userRegisterService, userLoginService } from '@/api/user.js'
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { useUserStore } from '@/stores/index'
import { useRouter } from 'vue-router'
const isRegister = ref(false)
// 整个的用于提交的form数据对象
const formModel = ref({
  username: 'tslidongxu',
  password: '111111',
  repassword: ''
})
// 绑定表单，获取表单内容
const form = ref()
// 整个表单的校验规则
// 1. 非空校验 required:truemessage消息提示,trigger触发校验的时机 blur change
// 2. 长度校验 min:xx, max:xx
// 3. 正则校验 pattern: 正则规则  \S 非空字符
// 4. 自定义校验 => 自己写逻辑校验（校验函数）
//    validator: (rule, value, callback)
//    (1) rule当前校验规则相关的信息
//    (2) value所校验的表单元素目前的表单值
//    (3) ca11back无论成功还是失败，都需要ca11back回调
//        -cal1back() 校验成功
//        -cal1back(new Error(错误信息)) 校验失败
const rules = {
  username: [
    {required: true, message: '请输入用户名', trigger: 'blur'},
    {min: 5, max: 10, message: '用户名必须是 5-10位 的字符', trigger: 'blur'}
  ],
  password: [
    {required: true, message: '请输入密码', trigger: 'blur'},
    {pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur'}
  ],
  repassword: [
    {required: true, message: '请输入密码', trigger: 'blur'},
    {pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur'},
    {
      validator: (rule,value,callback) => {
        // 判断 value和当前form中收集的password是否一致
        if(value !== formModel.value.password) {
          callback(new Error('两次输入密码不一致'))
        } else {
          callback() // 就算校验成功，也需要callback
        }
      },
      trigger: 'blur'
    }
  ]
}
// 点击登录事件
const userStore = useUserStore()
const router = useRouter()
const login = async () => {
  await form.value.validate()
  const res = await userLoginService(formModel.value)
  userStore.setToken(res.data.token) // 存储token
  //console.log('开始登录请求', res)
  ElMessage.success('登录成功')
  router.push('/') // 跳转到后台首页
}
// 点击注册事件
const register = async () => {
  // 注册成功之前，先进行校验，校验成功 → 请求，校验失败 → 自动提示
  await form.value.validate()
  await userRegisterService(formModel.value)
  //console.log('开始注册请求')
  ElMessage.success('注册成功')
  isRegister.value = false
}
// 监听变化  点击按钮切换的时候，重置表单内容
watch(isRegister, () => {
  formModel.value = {
    username: '',
    password: '',
    repassword: ''
  }
})
</script>

<template>
  <!--
    1. 相关结构
      el-row 表示一行，一行分成24份 
      el-col 表示列
      (1) :span="12"   代表在一行中, 表示占12份 (50%)
      (2) :span="6"    代表在一行中, 表示占6份  (25%)
      (3) :offset="3"  代表在一行中, 左侧margin份数
      
      el-form 整个表单组件
      el-form-item 表单的一行(一个表单域)
      el-input 表单元素(输入框)
    2. 校验相关
      (1) el-form => :model="ruleForm"  绑定的整个form的数据对象  { xxx，xxx，xxx }
      (2) el-form => :rules="rules"     绑定的整个rules规则对象   { xxx，xxx，xxx }
      (3) 表单元素 => v-model="ruleForm.xxx" 给表单元素，绑定form的子属性
      (4) el-form-item prop配置生效的是哪个校验规则（和rules中的字段要对应）
  -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!--注册表单-->
      <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-if="isRegister">
        <el-form-item><h1>注册</h1></el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" :prefix-icon="Lock" type="password" placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input v-model="formModel.repassword" :prefix-icon="Lock" type="password" placeholder="请再次输入密码"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>注册</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">← 返回登录</el-link>
        </el-form-item>
      </el-form>
      <!--登录表单-->
      <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
        <el-form-item><h1>登录</h1></el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" :prefix-icon="Lock" type="password" placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space>登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">注册 →</el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page{
  height: 100vh;
  background-color: #fff;
  .bg{
    background: url(@/assets/logo2.png) no-repeat 60% center / 240px auto, url(@/assets/login_bg.jpg) no-repeat center/cover;
    border-radius: 0 20px 20px 0;
  }
  .form{
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title{
      margin: 0 auto;
    }
    .button{
      width: 100%;
    }
    .flex{
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
